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WorksheetsUnit 2 part 1
Total questions: 36
Worksheet time: 26mins
Name
Class
Date
1.
What kind of properties can only be observed when a substance changes into a different substance?
a)
physical properties
b)
chemical properties
2.
Example of a physical property
a)
magnetism
b)
reactivity with oxygen
c)
flammability
d)
non-reactive
3.
Example for chemical property
a)
malleability
b)
texture
c)
combustion
d)
sour taste
4.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
5.
Is glass breaking a chemical or phyiscal change?
a)
chemical
b)
physical
6.
Is sqeezing organges to make orange juice a phyical or chemcial change?
a)
physical
b)
chemical
7.
When a scientist mixed two chemicals, an exothermic reaction takes place. Which of the following would be proof that the reaction was exothermic?
a)
a change of color
b)
a change of state
c)
a temperature decrease
d)
a temperature increase
8.
In an endothermic reaction, heat is ,,,
a)
taken in
b)
given out
9.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
10.
Organic substances are
a)
once derived from living organisms
b)
never derived from living organisms
11.
blue berry muffin
a)
heterogeneous mixture
b)
homogeneous mixture
12.
A compost pile in the backyard for the garden
a)
Heterogeneous
b)
Homogeneous
13.
black ink
a)
heterogeneous mixture
b)
homogeneous mixture
14.
If they are not the same throughout, they are called...
a)
Homogeneous
b)
Heterogeneous
c)
Compounds
d)
Pure substance
15.
A pure substance containing only one kind of atom.
a)
element
b)
mixture
c)
compound
16.
Stainless steel
a)
Heterogeneous
b)
Homogeneous
17.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
18.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
19.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
20.
Is this substance acidic, basic, or neutral?
a)
Acidic
b)
Basic
c)
Neutral
21.
Pure water is _______ on the pH scale.
a)
Acid
b)
Base
c)
Neutral
22.
A solution with a pH of 8.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
23.
What is the name of the Grinch's dog in "How the Grinch Stole Christmas"
a)
Scruffy
b)
Spot
c)
Fido
d)
Max
24.
an atom with atomic number 6 would have how many protons
a)
6
b)
12
c)
3
d)
cannot be determined
25.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
26.
True or False? Neutrons have a negative charge
a)
True
b)
False
27.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
28.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
29.
the central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
electron cloud
c)
core
d)
center
30.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
31.
How many protons are in Beryllium?
a)
4
b)
9
c)
5
d)
2
32.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
33.
Neutrons have a negative charge
a)
True
b)
False
34.
Of the following particles, those NOT found in the nucleus of an atom are
a)
protons
b)
neutrons
c)
electrons
d)
protons and neutrons
35.
Because an atom is neutral, the number of
a)
electrons equals the number of protons
b)
protons equals the number of neutrons
c)
isotopes equals the number of electrons
d)
electrons equals the number of neutrons
36.
The element with the smallest atomic number is
a)
helium
b)
carbon
c)
nitrogen
d)
hydrogen
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